modules/database/services/exam_projection.py projects a saved template into
cc.public.exams: ExamPaper -> Question/Part -> Region + Part-[:ASSESSES]->
SpecPoint, joined by shared UUIDs (exam_questions.id, exam_response_areas.id,
exam_code, spec_code). Full re-sync per exam_code (idempotent). Reads via
service role + writes via system Neo4j driver (R3.5.1 documented graph-writer).
Wiring (R3.5.4/R5.3):
- PUT /templates/{id} enqueues project_template_safe via BackgroundTasks
(swallows failures so a graph hiccup never fails the canvas save).
- POST /templates/{id}/neo4j-sync — manual trigger, as-user auth + owner check,
runs synchronously and returns projection counts.
Unit tests: projection scheduled on PUT; neo4j-sync owner/403/404.
Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>
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